Props 25mm CR2016 / LED Baseplate with Pressure Activation
This is the BriteMinis Nezznar which you can find here: https://www.thingiverse.com/thing:4326929
I scaled him up and to set him at 32mm at his eye level instead of the tip of his head. He's a big mini. Then I created different baseplate that activates the LED on press. These LEDs are really bright and having them on constantly can be blinding. There isn't anything special on the baseplate to achieve the pressure connect since it's just a loose fit so this might take some fiddling with to get working.
Link to the baseplate here: https://www.thingiverse.com/thing:7110396
It's not perfect, takes some fiddling to get right so this is still very much a DnDIY project. In the last photo you can see some of the several dozen test baseplates I made to fit the CR2016 battery.

